Grinding-mill



W. LABURDA. GRINDING MILL APPLICATION FILED APR. 13, 1920. 1 1,366,391 Patented Jan. 25, 1921. 2 SHEETSSHEET INVENIDR.

ATTORNEY W. LABURDA.

GRINDING MILL.

APPLICATION FILED APR. 13, I920.

Patented Jan. 25, 1921.

2 SHEETSSHEET 2- INVENT walfer Labur'd ATTORNEY UNITED STATES PATENT OFFICE.

WALTER LAIBURDA, OF GOALTOIT, OKLAHOMA.

GRIN DING-MILL.

Application flied April 13,

T 0 allwhom it may concern:

Be it known that I, WALT-ER LABURDA, citizen of Foland, residing at Coalton, in the county of Okmulgee and State of Oklahoma, have invented certain new and use ful Improvements in Grinding-Mills, of which the following is a specification.

This invention relates to a grinding mill intended more particularly for grinding grains such as corn, oats, wheat, barley or other grains, the invention having more particular reference to a portable grinding mill adapted for hand operation.

The invention has for an object to provide simple and inexpensive grindingrmill of the above type having a novel arrangement of driving means for driving-the rotary grinding element at various speeds, and new and improved arrangement of the grinding surfaces.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawings, and to the appended claims in which the various novel features of the invention are more particularly set forth.

Figure 1 of the drawings is a vertical sectional view of a grinding mill constructed according to the invention, this view being taken on the line 11 of Fig. 2.

Fig. 2 is a horizontal section 'on'the line 22 of Fig. 1.

Fig. 3 is a horizontalsection on the line 3-3 of Fig. 1.

Fig. 1 is a detail perspective view of the rotary grinding member.

As here shown the casing of my improved grinding mill is formed by a hollow wooden block 10 supported on legs 11, this bloclrbeing here of rectangular shape in horizontal section and provided with a circular chamber 12 open at the top.

Within the bottom of this chamber is supported the lower stationary grinding member 13 and above this stationary memher is mounted the rotatable grinding member 14:, these members jointly filling the chamber 12 and being. made of any usual or approved material. The upper member 14 is supported clear of the lower member by means of a screw 15 which is threaded v upwardly through the base of the casing 10 and passes freelythrough a suitable axial Specification of Letters Patent.

Patented Jan. 25, 1921.

1920. Serial K0. 373 638.

7 aperture in the lower member 13, and is fixed at their upper ends to one of the side walls of the hopper and have vertically slotted lower'ends 22 which extend downwardly across the face of the block 10 and are adjustably secured to the latter by means of the wing headed screws 23 passmg through the slots in the bars and threaded into the side wall of the block 10, headed pins 24 carried by the block and projecting through the slots in the bars serving to guide the latter during adjustment. H

The means which I have desi ned for rotating the upper grinding meniber 14 is as follows: 7 Mounted on the upper end of the member is a large gear 25 which may be held against rotation by being fitted over a square boss 26 on the upper end of this member. This gear meshes with a series of four smaller gears 26, 27, 28 and 29 located at diametrioally opposite sides thereof and suitably jcurnaled on top of the block 10, the gears 26, 27 and 28 being of different sizes, the gear 29 being simply an idler forming a side bearing for the grinding member 14. The gears 26, 27, and 28 are adapted to be engaged as desired by a large crown gear 30, means being provided on each side of the block to removably support the crown gear in engagement with the desired one of equal sized pinions 31 fixed co-axially to the small gears, the crown gear having a crank handle 32 fixed thereon for manual rotation.

As here shown a series of pintles 35 are fixed in the side walls of the block 10 and project outwardly therefrom, being preferably formed with enlarged headed bodies 36 which extend through the walls of the block and have nuts 37 threaded on their outer ends against the outer surfaces of the block. The gear is mounted loosely on the pintle 85 and is retained agalnst dis placement by a locking. yoke 38 whose legs.

engage in notches 39 on the p'intle, a pin 4L0 preventing disengagement of the yoke from the pintle. As will be obvious thegrinding member it will be driven at varying speeds for a given rotation of the gear 30 accordmg to which one of the pintles thelatter is mounted on.

' upper surface of the lower grinding element. The ground grain may be discharged through-the chute to any suitable receptacle such as that'indicated at 4:3.

Formed in the upper surface of the grinding member 13 is a spiral groove 44 whose outer end registers with the top of the chute "42 so that the ground material works through-this groove to this chute. The lower surface'of the upper grmding mem- 1 ber 14 is formed with series of radial grooves 415 and it will be apparent that the construction of the co-acting grinding surfaces causes both a shearing and crushing action to take place on the material and increases the efiiciency of the grinding mill.

Having thus described my invention what I claim as new and desire to protect by Letmounted an the top of said casing adjacent the sides thereoi a manually rotatable gear, and means provided on different sides of said casing for supporting said manually rotatable gear in engagement with any desired one of said gear elements, the respective gear elements having difierent trans mission ratios.

2. A device of the class described comprising a member to be rotated, a rectangular casing supporting said member, a gear bred to said member co-axially therewith, a series of gears of difierent sizes spaced around said first gear in engagement therewith and mounted on the top of said casing adjacent the sides thereof, ions fixed co-axially to the respective ones of said series of gears, a series 01" pintles projecting from the different sides of the casing, and a manually rotatable gear adapted to be removably mounted on either of the said pintles in engagement with either of the said pinions.

In testimony whereof I have aflixed my signature this 5th da of April 1920.

- WA TER LABURDA.

a series of pin- 

